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-rw-r--r--example/passthrough_ll.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/example/passthrough_ll.c b/example/passthrough_ll.c
index b15725f..46cc8e0 100644
--- a/example/passthrough_ll.c
+++ b/example/passthrough_ll.c
@@ -837,6 +837,12 @@ static void lo_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
else if (lo->cache == CACHE_ALWAYS)
fi->keep_cache = 1;
+ /* Enable direct_io when open has flags O_DIRECT to enjoy the feature
+ parallel_direct_writes (i.e., to get a shared lock, not exclusive lock,
+ for writes to the same file in the kernel). */
+ if (fi->flags & O_DIRECT)
+ fi->direct_io = 1;
+
/* parallel_direct_writes feature depends on direct_io features.
To make parallel_direct_writes valid, need set fi->direct_io
in current function. */